1 /*
2 * Copyright (c) 2017-2019 Arm Limited.
3 *
4 * SPDX-License-Identifier: MIT
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to
8 * deal in the Software without restriction, including without limitation the
9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in all
14 * copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 */
24 #include "NonMaximaSuppression.h"
25
26 #include "Utils.h"
27 #include "tests/validation/Helpers.h"
28
29 namespace arm_compute
30 {
31 namespace test
32 {
33 namespace validation
34 {
35 namespace reference
36 {
37 template <typename T>
non_maxima_suppression(const SimpleTensor<T> & src,BorderMode border_mode,T constant_border_value)38 SimpleTensor<T> non_maxima_suppression(const SimpleTensor<T> &src, BorderMode border_mode, T constant_border_value)
39 {
40 constexpr int block_size = 3;
41 SimpleTensor<T> dst(src.shape(), src.data_type(), src.num_channels());
42 ValidRegion valid_region = shape_to_valid_region(src.shape(), border_mode == BorderMode::UNDEFINED, BorderSize(block_size / 2));
43
44 const uint32_t num_elements = src.num_elements();
45 for(uint32_t i = 0; i < num_elements; ++i)
46 {
47 Coordinates coord = index2coord(src.shape(), i);
48 int x = coord.x();
49 int y = coord.y();
50
51 if(!is_in_valid_region(valid_region, coord))
52 {
53 continue;
54 }
55
56 if(src[i] >= tensor_elem_at(src, Coordinates(x - 1, y - 1), border_mode, constant_border_value) && src[i] >= tensor_elem_at(src, Coordinates(x, y - 1), border_mode, constant_border_value)
57 && src[i] >= tensor_elem_at(src, Coordinates(x + 1, y - 1), border_mode, constant_border_value) && src[i] >= tensor_elem_at(src, Coordinates(x - 1, y), border_mode, constant_border_value)
58 && src[i] > tensor_elem_at(src, Coordinates(x + 1, y), border_mode, constant_border_value) && src[i] > tensor_elem_at(src, Coordinates(x - 1, y + 1), border_mode, constant_border_value)
59 && src[i] > tensor_elem_at(src, Coordinates(x, y + 1), border_mode, constant_border_value) && src[i] > tensor_elem_at(src, Coordinates(x + 1, y + 1), border_mode, constant_border_value))
60 {
61 dst[i] = src[i];
62 }
63 else
64 {
65 dst[i] = T(0);
66 }
67 }
68
69 return dst;
70 }
71
72 template SimpleTensor<float> non_maxima_suppression(const SimpleTensor<float> &src, BorderMode border_mode, float constant_border_value);
73 template SimpleTensor<uint8_t> non_maxima_suppression(const SimpleTensor<uint8_t> &src, BorderMode border_mode, uint8_t constant_border_value);
74 } // namespace reference
75 } // namespace validation
76 } // namespace test
77 } // namespace arm_compute
78